People: Chi Shu

Graduate Student
  1. E. Pedrozo, S. Colombo, C. Shu, A. Adiyatullin, Z. Li, E. Mendez, B. Braverman, A. Kawasaki, V. Vuletic, D. Akamatsu, and Y. Xiao. Entanglement on an optical atomic-clock transition. Nature, 588:414–418, December 2020. View Abstract
  2. A. Kawasaki, B. Braverman, E. Pedrozo, C. Shu, S. Colombo, Z. Li, V. Vuletic, Trapping 171Yb Atoms into a One-Dimensional Optical Lattice with Small Waist. Phys Rev A, 102(013114), 2020.
  3. A. Kawasaki, B. Braverman, E. Pedrozo, C. Shu, S. Colombo, Z. Li, I. Ozel, W. Chen, D. Levonian, Y. Xiao, V. Vuletic, L. Salvi, A. Heinz, and D. Akamatsu. Geometrically asymmetric optical cavity for strong atom-photon coupling. Phys Rev A January 2019.
  4. B. Braverman, A. Kawasaki, E. Pedrozo, S. Colombo, C. Shu, Z. Li, E. Mendez, Y. Xiao, V. Vuletic, M. Yamoah, L. Salvi, and D. Akamatsu. Near-Unitary Spin Squeezing in 171Yb. Phys. Rev. Lett., 122(223203), June 2019.
  5. G. Scuri, Y. Zhou, A. High, D. Wild, C. Shu, K. de Greve, M. Lukin, H. Park, L. A. Jauregui, T. Taniguchi, K. Watanabe, and P. Kim. Large excitonic reflectivity of monolayer MoSe2 encapsulated in hexagonal boron nitride. Phys. Rev. Lett. , 120(037402), January 2018.
  6. G. Scuri, Y. Zhou, A. High, D. Wild, C. Shu, K. de Greve, M. Lukin, H. Park, L.A. Jauregui, T. Taniguchi, K. Watanabe, and P. Kim. Atomically thin mirrors made of monolayer semiconductors.
  7. Y. Zhou, G. Scuri, D. Wild, A. High, A. Dibos, C. Shu, K. de Greve, M. Lukin, H. Park, L.A Jauregui, K. Pistunova, A. Joe, T. Taniguchi, K. Watanabe, and P.Kim. Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons.
Thu February 3, 2022

Reversing time for quantum-enhanced metrology

The group of Prof. Vuletic, at MIT, demonstrated that reversing the time in an atomic sensor can lead to a strongly enhanced sensitivity. With this time-reversal protocol, sensors can be operated with highly-entangled states which carry large statistical information close to the fundamental Heisenberg Limit.  Due to their fragility, these “superior” quantum states are extremely...
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Sun June 7, 2020

Entanglement-based Optical Atomic Clock beats the Standard Quantum Limit

Optical lattice clocks (OLC) are widely recognized as the next golden standard for timekeeping. Over the past decades, researchers around the world have made the second the best characterized among all seven of International System of Units (SI units), reaching an unprecedented fractional stability at few parts-of-ten-Quintillion (1019). Despite the tremendous effort of improving technology...
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Thu May 9, 2019

Near Unitary Squeezing

A group at the MIT led by Prof. Vladan Vuletić has recently generated significant amount of spin squeezing-a type of quantum entanglement-in an ultracold vapor of ytterbium-171. Spin squeezed states (SSS) can be used to overcome the standard quantum limit (SQL) which bounds state-of-the-art atomic sensors like optical clocks. The latter deploy a dilute vapor...
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Mon April 22, 2019

Direct Laser Cooling Rubidium Atoms

A group at MIT led by Vladan Vuletic has recently created a Bose-Einstein Condensate (BEC) of rubidium atoms with a new method, direct laser cooling. Many researchers have attempted this elusive goal in the past, but due to various complications resorted to reaching BEC through evaporation instead. Compared to cooling through evaporation, laser cooling is...
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